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SHARE BASED COMPENSATION - Summary of Plans and Stock Option Info (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Jul. 01, 2017
Jul. 02, 2016
Weighted average assumptions        
Expected life (in years) 4 years 10 months 24 days 5 years 2 months 12 days    
Risk-free interest rate (as a percent) 1.88% 1.61%    
Volatility (as a percent) 71.40% 63.60%    
Dividend yield (as a percent) 0.00% 0.00%    
Forfeiture rate (as a percent) 22.60% 11.30%    
2006 Plan and 2012 Plan | Selling, General and Administrative Expenses        
SHARE BASED COMPENSATION        
Share-based compensation expense $ 189 $ 91 $ 274 $ 218
2006 Plan and 2012 Plan | Stock options        
SHARE BASED COMPENSATION        
Stock options outstanding (in shares) 1,261,444   1,261,444  
Stock options granted during the period (in shares) 390,500      
2006 Plan and 2012 Plan | Restricted Stock Awards        
SHARE BASED COMPENSATION        
Unvested restricted shares outstanding 376,780   376,780  
Granted (in shares) 226,500      
2006 Plan        
SHARE BASED COMPENSATION        
Number of shares authorized under the plan 3,000,000   3,000,000  
Shares available to grant 0   0  
2012 Plan        
SHARE BASED COMPENSATION        
Number of shares authorized under the plan 1,700,000   1,700,000  
Shares available to grant 1,222,216   1,222,216